The drill machine chain can perform cold rolling, copper plating, or thread phosphating, and can also process double-thread and other special threads of other specifications.
| Drill Chain Number | Outer Diameter | Bore | Length, mm | Shoulder chamfer diameter DF , mm | Flexural Strength Ratio | |||||
| mm | in | mm | in | |||||||
| NC23-31 | 79.4 | 3 /8 | 31.8 | 1 1/4 | 9150 | 76.2 | 2.57:1 | |||
| NC26-35 | 88.9 | 3 1/2 | 38.1 | 1 1/2 | 9150 | 82.9 | 2.42:1 | |||
| NC31-41 | 104.8 | 4 1/8 | 50.8 | 2 | 9150 or 9450 | 100.4 | 2.43:1 | |||
| NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 9150 or 9450 | 114.7 | 2.58:1 | |||
| NC38-60 | 127.0 | 5 | 57.2 | 2 1/4 | 9150 or 9460 | 121.0 | 2.38:1 | |||
| NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | 9150 or 9450 | 144.5 | 2.49:1 | |||
| NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | 9150 or 9450 | 144.5 | 2.84:1 | |||
| NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | 9150 or 9450 | 149.2 | 2.91:1 | |||
| NC46-62 | 158.8 | 6 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 150.0 | 2.63:1 | |||
| NC46-65 | 165.1 | 6 1/2 | 57.2 | 2 1/4 | 9150 or 9450 | 154.8 | 2.76:1 | |||
| NC46-65 | 165.1 | 6 1/2 | 71.4 | 2 13/16 | 9150 or 9450 | 154.8 | 3.05:1 | |||
| NC46-47 | 171.4 | 6 3/4 | 57.2 | 2 1/4 | 9150 or 9450 | 159.5 | 3.18:1 | |||
| NC50-67 | 171.4 | 6 3/4 | 71.4 | 2 13/16 | 9150 or 9450 | 159.5 | 2.37:1 | |||
| NC50-70 | 177.8 | 7 | 57.2 | 2 1/4 | 9150 or 9450 | 164.7 | 2.54:1 | |||
| NC50-70 | 177.8 | 7 | 71.4 | 2 13/16 | 9150 or 9460 | 164.7 | 2.73:1 | |||
| NC50-72 | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 169.5 | 3.12:1 | |||
| NC56-77 | 196.8 | 7 3/4 | 71,4 | 2 13/16 | 9150 or 9450 | 185.3 | 2.70:1 | |||
| NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | 9150 or 9450 | 190.1 | 3.02:1 | |||
| 65/8REG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 195.7 | 2.93:1 | |||
| NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | 9150 or 9450 | 212.7 | 3.17:1 | |||
| 75/8REG | 241.3 | 9 1/2 | 76.2 | 3 | 9150 or 9450 | 223.8 | 2.81:1 | |||
| NC70-97 | 247.6 | 9 3/4 | 76.2 | 3 | 9150 or 9450 | 232.6 | 2.57:1 | |||
| NC70-100 | 254.0 | 10 | 76.2 | 3 | 9150 or 9450 | 237.3 | 2.81:1 | |||
| 85/8REG | 279.4 | 11 | 76.2 | 3 | 9150 or 9450 | 266.7 | 2.84:1 | |||
| Outer Diameter Limit | Outer Diameter | Bore | Length, mm | Diameter of the shoulder chamfer DF, mm | ||
| mm | in | |||||
| ≤88.9 | ≤31/2 | +1.20 | +1.60 | ±152.4 | ±0.4 | |
| >88.9-114.3 | >3 1/2~4 1/2 | +1.60 | ||||
| >114.9-139.7 | >4 1/2~5 1/2 | +2.00 | ||||
| >139.7-165.1 | >5 1/2-6 1/2 | +3.20 | ||||
| >165.1-215.9 | >6 1/2~8 1/2 | +4.00 | ||||
| >215.9-241.3 | >8 1/2-9 1/2 | +4.80 | ||||
| >241.3 | >9 1/2 | +6.40 | ||||
Outer Diameter Limit | Yield Strength RP 0,2 MPa | Tensile strength Rm Mpa | Elongation Factor A% | Brinell Hardness HB | Charpy's percussion work Akv J | ||
| mm | in | ||||||
| 79.4-174.6 | 3 1/8-6 3/4 | ≥758 | ≥965 | ≥13 | ≥285 | ≥54 | |
| 177.8-279.4 | 7-11 | ≥689 | ≥930 | ||||
